<template>
 <div>
  <ul>
    <li v-for="(item,index) in list" :key="index">{{item}}</li>
  </ul>
  <button @click="run()">走一走</button>
 </div>
</template>

<script>
 export default {
   name: 'App',
   data () {
     return {
      list:['机器猫','海绵宝宝','懒羊羊']
     }
   },
   methods:{
    run(){
      this.list.push(this.list.splice(0,1).join())
    }
   }
 }
</script>

<style>

</style>